Botany - Mineral Nutrition Question with Solution | TestHub
BotanyMineral NutritionNitrogen MetabolismEasy2 minPYQ_2020
BotanyEasysingle choice
Select the correctly matched ones from the following.
I.Nitrosomonas- Nitrite to nitrate
II.Thiobacillus- Denitrification
III.Nostoc- Free-living nitrogen-fixer
IV.Azotobacter- Anaerobic nitrogen-fixer
Options:
Answer:
C
Solution:
Nitrate present in the soil is reduced to nitrogen by the process of denitrification. Denitrification is carried by bacteriaPseudomonasand Thiobacillus.
A number of cyanobacteria such asAnabaenaandNostoc are free-living nitrogen-fixers.
AzotobacterandBeijernickiaare free-living nitrogen-fixing aerobic microbes.
Nitrosomonasand/orNitrosococcusoxidise NH3to nitrite.
The nitrite is further oxidised to nitrate with the help ofNitrobacter andNitrocystis.
Stream:NTA_ABHYAS_NEETSubject:BotanyTopic:Mineral NutritionSubtopic:Nitrogen Metabolism
⏱ 2mℹ️ Source: PYQ_2020
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